CN219181268U - 36-slot 8-pole single-layer mixed concentric coil winding and motor - Google Patents
36-slot 8-pole single-layer mixed concentric coil winding and motor Download PDFInfo
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- CN219181268U CN219181268U CN202222331949.2U CN202222331949U CN219181268U CN 219181268 U CN219181268 U CN 219181268U CN 202222331949 U CN202222331949 U CN 202222331949U CN 219181268 U CN219181268 U CN 219181268U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a 36-slot 8-pole single-layer mixed concentric coil winding, wherein the number of stator slots is 36 slots, and the number of poles is 8 poles; the coil I, the coil II and the coil III in each pole phase are arranged in series; the coil II and the coil III are concentric, and the coil II comprises the coil III; the spans of the coil I and the coil II are 5 stator slot pitches, and the span of the coil III is 3 stator slot pitches. The utility model also discloses a motor. The utility model reduces the damage of the stator enameled wire and improves the insulation strength and the motor reliability; meanwhile, the working efficiency is improved, and the tissue production is facilitated; by the winding coefficient K qy The original 0.9597 is improved to 0.9728, so that the impurity consumption of the motor is reduced by 20-30%, and the efficiency is improved by about 0.40.7%, and the production efficiency is improved by more than 40%.
Description
Technical Field
The utility model belongs to the field of motor coil windings, and particularly relates to a 36-slot 8-pole single-layer mixed concentric coil winding and a motor.
Background
Currently, in the 8P motor design with H100 machine base number below, i.e. H63-90 small machine base number, the stator is mostly 36 slot design, and in the aspect of stator wiring, fractional slot wiring occurs (i.e. q=z/2pm=1.5, where z is the number of stator slots; P is the pole pair number; m is the phase number) due to q=1.5, so that most manufacturers use double-layer lap winding mode for wiring. That is, when the double-layer winding of 36 slots 8P is wired, the pitch is usually set to y=4, and 36 identical coils are used, and the coils are placed in the stator to form a winding in such a manner that the latter coil is stacked on the former coil in the double-layer lap arrangement shown in fig. 1. However, because the stator has smaller inner diameter and groove shape, the manufacturability is poor, and wire jumpers and wire damage often occur when the stator is in a down-line state, so that the motor is damaged in insulation and even breaks down; because the double-layer coils are more in number and twice as many as the single-layer coils, the working efficiency is lower when the coil is off line, the production organization is not facilitated, and the manual production efficiency is low.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a 36-slot 8-pole single-layer mixed concentric coil winding and a motor, which can reduce the damage of a stator enameled wire and improve the insulation strength and the reliability of the motor.
The technical scheme adopted for solving the technical problems is as follows: a 36-slot 8-pole single-layer mixed concentric coil winding,
the stator slots are 36 slots, and the poles are 8 poles;
the coil I, the coil II and the coil III in each pole phase are arranged in series;
the coil II and the coil III are concentric, and the coil II comprises the coil III;
the spans of the coil I and the coil II are 5 stator slot pitches, and the span of the coil III is 3 stator slot pitches.
Further, the methodThe radius of the circular arcs at the two ends of the coil I is R 1 The height of the coil I is h 1 ＝L 0 +L x +L 1 Wherein L0 is the length of the iron core, L 1 ＝2R 1 。
Further, the size, shape and number of the coils II are the same as those of the coils I, and the coils II are arranged behind the coils I.
Further, the radius of the circular arcs at the two ends of the coil III is R 3 The height of the coil III is h 3 ＝L 0 +L x +L 3 Wherein L is 0 Is the length of the iron core, L 3 ＝2R 3 。
Further, L x ＝8-12mm。
Further, the number of the coils I and III is 6.
Further, the coil I-coil II, the coil III, the coil I-coil II and the coil III form a U-phase coil; the coil II, the coil III, the coil I, the coil II and the coil III form a V-phase coil; the coil I-coil II, the coil III, the coil I-coil II and the coil III form a W-phase coil.
Further, the interval of the U, V, W phase coil is 3 stator slots.
Further, the spans of the coil I, the coil II and the coil III are (1-6), (10-15) and (11-14) in sequence.
The utility model also discloses a motor which comprises a stator and a rotor, wherein the stator adopts the 36-slot 8-pole single-layer mixed concentric coil winding.
The utility model solves the problems of poor manufacturability and low insulation strength of the double-layer winding by adopting a mode of concentric wiring of 1-2-1-2 single-layer coils for each phase (see figure 3).
The beneficial effects of the utility model are as follows: the damage of the stator enameled wire is reduced, and the insulation strength and the motor reliability are improved; meanwhile, the working efficiency is improved, and the tissue production is facilitated; by the winding coefficient K qy The original 0.9597 is improved to 0.9728, so that the impurity consumption of the motor is reduced by 20-30%, the efficiency is improved by about 0.4-0.7%, and the production efficiency is also improvedAbout 40% or more.
Drawings
Fig. 1 is an expanded view of a 36 slot 8 pole double laminated wound coil in the prior art.
Fig. 2 is an expanded view of the present utility model.
Fig. 3 is an expanded view of the W-phase coil of the present utility model.
Fig. 4 is a schematic diagram of a coil of the present utility model.
Detailed Description
In order to make the present utility model better understood by those skilled in the art, the following description of the technical solutions of the present utility model will be made in detail, but not all embodiments of the present utility model are apparent to some embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
As shown in figures 2-4, a single-layer mixed concentric coil winding with 36 slots and 8 poles has 36 slots and 8 poles, and is mainly formed by arranging three parts of a coil I, a coil II and a coil III in series.
Wherein the width L1 of the coil I is equal to the pitch y= (1-6), i.e. 5 stator slot pitches; the height of the coil I is h 1 ＝L 0 +L x +L 1 Wherein L is 0 Is the length of the iron core, L 1 ＝2R 1 ，R 1 Is the radius of the circular arcs at the two ends of the coil I, L x =8-12 mm, here preferably 10mm, and in practice production personnel will have certain operating errors. The number of coils I is 6, each phase is 2, and the positions of the coils are independent and are connected with the coils II through interelectrode connecting wires.
The size, shape and number of the coils II are the same as those of the coils I, and the description is omitted. However, the coil II and the coil I are arranged behind the coil I at different positions in the winding, are connected in series with the coil I through an interelectrode connecting wire, and include the coil III therein to be connected in series with the coil III. The width of the coil ii is equal to the pitch y= (10-15).
Width L of coil III 3 The same pitch y= (11-14), i.e. 3 stator slot pitches; the height of the coil III is h 3 ＝L 0 +L x +L 3 Wherein L is 0 Is the length of the iron core, L 3 ＝2R 3 ，R 3 Is the radius of the circular arcs at the two ends of the coil III, L x =8-12 mm, here preferably 10mm, and in practice production personnel will have certain operating errors. The number of coils III is 6, 2 each phase, and the position of each coil is contained by the coil II and is connected with the coil II in series.
The arrangement sequence of the U-phase coils is coil I-coil II and coil III-coil I-coil II and coil III, and 6 coils are collectively called as A group; the arrangement sequence of the V-phase coils is coil II, coil III, coil I, coil II and coil III, coil I, 6 coils are collectively called as B group; the arrangement sequence of the W-phase coil is coil I-coil II and coil III-coil I-coil II and coil III, and 6 coils are collectively called as C group; the coils of the A group, the B group and the C group are mutually separated by 3 stator slots. As particularly shown in fig. 2.
By improving the original design scheme, the winding coefficient K qy The original 0.9597 is improved to 0.9728, so that the impurity consumption of the motor is reduced by 20-30%, the efficiency is improved by about 0.4-0.7%, and the production efficiency is improved by more than 40%.
The specific calculation method comprises the following steps: since the coil pitch y=4 at the time of the original double-layer lap winding is adjusted to the new pitch y= (5+5+3)/3=4.33, at the time of double-layer lap winding: short distance coefficient K y =sin (β×90 °) = 0.9848 (where β=y×p/z= 0.8889); distribution coefficient K Q ＝0.9746；K qy ＝K Q ×K y ＝0.9597；
When the single layers are concentric: short distance coefficient K y =sin (β×90 °) =0.9982 (where β=y×p/z= 0.9622); distribution coefficient K Q ＝0.9746；K qy ＝K Q ×K y ＝0.9728。
The fraction groove comprises the following parts: in the three-phase asynchronous motor, the number of slots occupied by the coil of each pole and each phase is not an integer, but is fractional;
double-layer lap winding: the motor coils are double-layered, the pitches are the same, and the back coil is overlapped on the front coil, so that the winding is called overlapped;
single layer concentricity: it means that 2 or more coils are concentrically sleeved together to form a pole phase group;
breakdown: refers to the damage of the insulation strength, which is equivalent to the short circuit state;
pitch: the distance of the slots spanned by the two sides of a coil is the pitch, typically expressed in terms of slot number;
inter-electrode connection: the connection line between the coils under each pole in the stator winding is an interelectrode connection line, generally called a bridge wire, and is isolated from interphase insulation through an insulating sleeve.
The foregoing detailed description is provided to illustrate the present utility model and not to limit the utility model, and any modifications and changes made to the present utility model within the spirit of the present utility model and the scope of the appended claims fall within the scope of the present utility model.
Claims (7)
1. A36 slot 8 pole single layer mixed concentric coil winding is characterized in that:
the stator slots are 36 slots, and the poles are 8 poles;
the coil I, the coil II and the coil III in each pole phase are arranged in series;
the coil II and the coil III are concentric, and the coil II comprises the coil III;
the spans of the coil I and the coil II are 5 stator slot pitches, and the span of the coil III is 3 stator slot pitches.
2. The 36 slot 8 pole single layer hybrid concentric coil winding of claim 1, wherein: the size, shape and number of the coils II are the same as those of the coils I, and the coils II are arranged behind the coils I.
3. The 36 slot 8 pole single layer hybrid concentric coil winding of claim 1, wherein: the number of the coils I and III is 6.
4. The 36 slot 8 pole single layer hybrid concentric coil winding of claim 1, wherein: the coil I-coil II, the coil III, the coil I-coil II and the coil III form a U-phase coil; the coil II, the coil III, the coil I, the coil II and the coil III form a V-phase coil; the coil I-coil II, the coil III, the coil I-coil II and the coil III form a W-phase coil.
5. The 36 slot 8 pole single layer hybrid concentric coil winding of claim 4, wherein: the intervals of the U-phase coil, the V-phase coil and the W-phase coil are all 3 stator slots.
6. The 36 slot 8 pole single layer hybrid concentric coil winding of claim 1, wherein: the spans of the coil I, the coil II and the coil III are (1-6), (10-15) and (11-14) in sequence.
7. An electric machine comprising a stator and a rotor, characterized in that: the stator employs a 36 slot 8 pole single layer hybrid concentric coil winding as defined in any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222331949.2U CN219181268U (en) | 2022-08-31 | 2022-08-31 | 36-slot 8-pole single-layer mixed concentric coil winding and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222331949.2U CN219181268U (en) | 2022-08-31 | 2022-08-31 | 36-slot 8-pole single-layer mixed concentric coil winding and motor |
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| Publication Number | Publication Date |
|---|---|
| CN219181268U true CN219181268U (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222331949.2U Active CN219181268U (en) | 2022-08-31 | 2022-08-31 | 36-slot 8-pole single-layer mixed concentric coil winding and motor |
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| Country | Link |
|---|---|
| CN (1) | CN219181268U (en) |
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2022
- 2022-08-31 CN CN202222331949.2U patent/CN219181268U/en active Active
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